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Originally Posted By Seastate:There are fresh water puffers but they can be VERY aggressive.

When we were first married my wife set up a 55 gallon tank with 6 bumble bee puffers and a few othe fish.
I talked her into buying a couple of small fresh water crabs help keep the bottom of the tank clean and i thought they kinda cool.

Those crabs were in the tank for about 30 minutes when they caught the attention of the puffers. They tore those crabs apart and ate them in nothing flat.

Originally Posted By JSmith88:I can name the puffer KIA because he's going to need some salt in the aquarium.

Really? The guy at the pet store said they were both fresh water. If he dies within three days there is a return policy

A) Most pet store employees are completely ignorant about what they are selling. It's just a job to them.

B) Did you cycle the tank? If not your fishy's are dead...

This. Puffers are brackish. Uncycled tank means ammonia levels are going to spike hard in that small tank very soon and you will be looking at two floaters, though they could pull through, but they will have severely shortened life spans.

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Originally Posted By JSmith88:I can name the puffer KIA because he's going to need some salt in the aquarium.

Really? The guy at the pet store said they were both fresh water. If he dies within three days there is a return policy

A) Most pet store employees are completely ignorant about what they are selling. It's just a job to them.

B) Did you cycle the tank? If not your fishy's are dead...

I agree. Those puffers like brackish water. They live in coastal mangrove swamps, IIRC.

And yeah, you need to cycle the tank first. You can do this with pure ammonia (no surfactants), or a dead shrimp.

Okay so what exactly do I need to do? Husband told me to ask you guys.

First we need to know what kind of puffers you have so we can tell you what water conditions they need to survive. Next, to cycle the tank correctly, you will need an aquarium water test kit, along with some ammonia.

Just learn the nitrogen cycle. Ammonia > Nitrite > Nitrate. It is broken down by aerobic bacteria. First two are horrible, but the last one is tolerable to many fresh/brackish water fish. Puffers don't handle nitrates as well as most fish, either. They also like warmer water than your fantail. They can both be comfortable at the same pH, though. Bottom line is that is not a great combo.

I used to operate an aquarium shop years ago, took it from 800k a year to 2.4 mil/year gross, in 5 years. Didn't like my share of the profits and moved on. The shop finally, after gaining horrible reviews in spite of the makeover I gave it, closed earlier this year due to a "downturn in the economy." I honestly wish it was still there, I put a lot of work in that place, and I used to buy fish there when I was a kid..

i see two fish that will be dead in a week, considering one of them is a brackish water puffer from a tropical ecosystem and the other is a cold water goldfish. THIS is what happens when people don't know what they're doing at the aquarium store.